The B1298 Code defines error of engine and it is important to identify the problem. The same code is found for different engines of the car. You should know the exact model and manufacturer of the car. However, it is also important to read the manual of the engine if you want to solve the problem. The B1298 code has a specific meaning and you need to know the definition of the dictionary meaning. You should check the choke plate and check the position. You should check that it is working or not.is it open? If not, then you should replace it.